Cannula for clearing lens condensation during vitrectomy

摘要

An infusion cannula for use in clearing and preventing condensation on the posterior surface of an artificial lens during the fluid-gas exchange portion of a pars plana vitrectomy is described. The infusion cannula directs the flow of gas entering the eye toward the posterior surface of the lens. The moisture content of the gas supplied to the infusion cannula is minimized in order to increase the effectiveness with which condensation is removed or prevented. Additionally, the temperature of the gas supplied to the infusion cannula is controlled to further increase the effectiveness with which condensation is removed.